protected override IEnumerable <Alpha> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var element in InnerLexer.Read(scanner, context))
{
yield return(new Alpha(element));
}
}
private IEnumerable <Repetition> Branch(
[NotNull] ITextScanner scanner,
[NotNull] ITextContext root,
[NotNull] List <Element> elements)
{
if (elements.Count == UpperBound)
{
yield return(new Repetition(string.Concat(elements), elements, root));
}
else
{
var element = Lexer.Read(scanner);
if (element != null)
{
var copy = new List <Element>(elements)
{
element
};
foreach (var repetition in Branch(scanner, root, copy))
{
yield return(repetition);
}
}
else if (elements.Count >= LowerBound)
{
yield return(new Repetition(string.Concat(elements), elements, root));
}
}
}
protected override IEnumerable <HorizontalTab> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var terminal in InnerLexer.Read(scanner, context))
{
yield return(new HorizontalTab(terminal));
}
}
protected override IEnumerable <LinearWhiteSpace> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var repetition in InnerLexer.Read(scanner, context))
{
yield return(new LinearWhiteSpace(repetition));
}
}
protected override IEnumerable <CarriageReturn> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var terminal in InnerLexer.Read(scanner, context))
{
yield return(new CarriageReturn(terminal));
}
}
protected override IEnumerable <Term> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var concatenation in InnerLexer.Read(scanner, context))
{
yield return(new Term(concatenation));
}
}
protected override IEnumerable <Bit> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var alternation in InnerLexer.Read(scanner, context))
{
yield return(new Bit(alternation));
}
}
/// <summary>
///
/// </summary>
/// <param name="scanner"></param>
/// <exception cref="ArgumentNullException"></exception>
/// <returns></returns>
public override ReadResult <Alternative> Read(ITextScanner scanner)
{
if (scanner == null)
{
throw new ArgumentNullException(nameof(scanner));
}
var context = scanner.GetContext();
IList <SyntaxError> errors = new List <SyntaxError>(lexers.Length);
SyntaxError partialMatch = null;
// ReSharper disable once ForCanBeConvertedToForeach
for (var i = 0; i < lexers.Length; i++)
{
var result = lexers[i].ReadElement(scanner);
if (result.Success)
{
return(ReadResult <Alternative> .FromResult(new Alternative(result.Text, result.Element, context, i + 1)));
}
errors.Add(result.Error);
if (partialMatch == null || result.Text.Length > partialMatch.Text.Length)
{
partialMatch = result.Error;
}
}
Debug.Assert(partialMatch != null, "partialMatch != null");
return(ReadResult <Alternative> .FromSyntaxError(partialMatch));
}
public override ReadResult <Terminal> Read(ITextScanner scanner)
{
if (scanner == null)
{
throw new ArgumentNullException(nameof(scanner));
}
var context = scanner.GetContext();
MatchResult result = null;
// ReSharper disable once ForCanBeConvertedToForeach
for (var i = 0; i < valueRange.Length; i++)
{
var c = valueRange[i];
result = scanner.TryMatch(c);
if (result.EndOfInput)
{
return(ReadResult <Terminal> .FromSyntaxError(SyntaxError.FromMatchResult(result, context)));
}
if (result.Success)
{
return(ReadResult <Terminal> .FromResult(new Terminal(result.Text, context)));
}
}
Debug.Assert(result != null, "result != null");
return(ReadResult <Terminal> .FromSyntaxError(SyntaxError.FromMatchResult(result, context)));
}
private IEnumerable <Concatenation> Branch(
ITextScanner scanner,
ITextContext root,
List <Element> elements)
{
if (elements.Count == lexers.Count)
{
yield return(new Concatenation(string.Concat(elements), elements, root));
}
else
{
var next = lexers[elements.Count];
var element = next.Read(scanner);
if (element != null)
{
var copy = new List <Element>(elements)
{
element
};
foreach (var concat in Branch(scanner, root, copy))
{
yield return(concat);
}
}
}
}
protected override IEnumerable <VisibleCharacter> ReadImpl(ITextScanner scanner, ITextContext context)
{
foreach (var terminal in InnerLexer.Read(scanner, context))
{
yield return(new VisibleCharacter(terminal));
}
}
protected override IEnumerable <UserInformation> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var repetition in InnerLexer.Read(scanner, context))
{
yield return(new UserInformation(repetition));
}
}
protected override IEnumerable <AuthorityForm> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var authority in InnerLexer.Read(scanner, context))
{
yield return(new AuthorityForm(authority));
}
}
protected override IEnumerable <SubcomponentsDelimiter> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var alternation in InnerLexer.Read(scanner, context))
{
yield return(new SubcomponentsDelimiter(alternation));
}
}
protected override IEnumerable <BadWhiteSpace> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var optionalWhiteSpace in InnerLexer.Read(scanner, context))
{
yield return(new BadWhiteSpace(optionalWhiteSpace));
}
}
protected override IEnumerable <TransferEncoding> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var requiredDelimitedList in InnerLexer.Read(scanner, context))
{
yield return(new TransferEncoding(requiredDelimitedList));
}
}
protected override IEnumerable <OptionalDelimitedList> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var repetition in InnerLexer.Read(scanner, context))
{
yield return(new OptionalDelimitedList(repetition));
}
}
protected override IEnumerable <AsteriskForm> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var terminal in InnerLexer.Read(scanner, context))
{
yield return(new AsteriskForm(terminal));
}
}
protected override IEnumerable <ChunkExtensionName> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var token in InnerLexer.Read(scanner, context))
{
yield return(new ChunkExtensionName(token));
}
}
protected override IEnumerable <SegmentNonZeroLength> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var repetition in InnerLexer.Read(scanner, context))
{
yield return(new SegmentNonZeroLength(repetition));
}
}
public ReadImpl(
[NotNull] Lexer <TElement> lexer,
[NotNull] ITextScanner scanner,
[NotNull] ITextContext context)
{
this.lexer = lexer ?? throw new ArgumentNullException(nameof(lexer));
this.scanner = scanner ?? throw new ArgumentNullException(nameof(scanner));
this.context = context ?? throw new ArgumentNullException(nameof(context));
}
protected override IEnumerable <AbsolutePath> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var repetition in InnerLexer.Read(scanner, context))
{
yield return(new AbsolutePath(repetition));
}
}
public LexerImpl(
[NotNull] Lexer <TElement> impl,
[NotNull] ITextScanner scanner,
[NotNull] ITextContext context)
{
this.impl = impl;
this.scanner = scanner;
this.context = context;
}
protected override IEnumerable <TransferCodingCollection> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var alternation in InnerLexer.Read(scanner, context))
{
yield return(new TransferCodingCollection(alternation));
}
}
protected override IEnumerable <Method> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var token in InnerLexer.Read(scanner, context))
{
yield return(new Method(token));
}
}
protected override IEnumerable <LeastSignificantInt32> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var alternation in InnerLexer.Read(scanner, context))
{
yield return(new LeastSignificantInt32(alternation));
}
}
protected override IEnumerable <Fragment> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var repetition in InnerLexer.Read(scanner, context))
{
yield return(new Fragment(repetition));
}
}
protected override IEnumerable <ProtocolVersion> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var token in InnerLexer.Read(scanner, context))
{
yield return(new ProtocolVersion(token));
}
}
protected override IEnumerable <Connection> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var requiredDelimitedList in InnerLexer.Read(scanner, context))
{
yield return(new Connection(requiredDelimitedList));
}
}
protected override IEnumerable <TransferEncodingCollection> ReadImpl(
ITextScanner scanner,
ITextContext context)
{
foreach (var optionalDelimitedList in InnerLexer.Read(scanner, context))
{
yield return(new TransferEncodingCollection(optionalDelimitedList));
}
}
